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13208374991 = 740117232731
BaseRepresentation
bin11000100110100011…
…11100111011001111
31021002111212222012202
430103101330323033
5204022320444431
610022353152115
7645213222620
oct142321747317
937074788182
1013208374991
115668868699
12268755b63b
1313265cc006
148d42cba47
155248b28cb
hex31347cecf

13208374991 has 16 divisors (see below), whose sum is σ = 15147257088. Its totient is φ = 11282544000.

The previous prime is 13208374981. The next prime is 13208374997. The reversal of 13208374991 is 19947380231.

It is not a de Polignac number, because 13208374991 - 218 = 13208112847 is a prime.

It is a super-2 number, since 2×132083749912 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13208374997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4835096 + ... + 4837826.

It is an arithmetic number, because the mean of its divisors is an integer number (946703568).

Almost surely, 213208374991 is an apocalyptic number.

13208374991 is a deficient number, since it is larger than the sum of its proper divisors (1938882097).

13208374991 is a wasteful number, since it uses less digits than its factorization.

13208374991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 13208374991 in words is "thirteen billion, two hundred eight million, three hundred seventy-four thousand, nine hundred ninety-one".

Divisors: 1 7 401 1723 2731 2807 12061 19117 690923 1095131 4705513 4836461 7665917 32938591 1886910713 13208374991